72_小球落地

#include<iostream>
#include<stdio.h>
using namespace std;
int main()
{
    double M;
    int N;
    cin>>M>>N;
    double sum=M;
    while(--N){
        sum = sum + M/2;
        M = M/2;
        sum = sum + M;
    }
    printf("%.2lf %.2lf",M/2,sum);
    return 0;
}